X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fc-objc-common.c;h=4b09c3e40d861e5bf92785cf45de85c14a8872d5;hb=9e6a09670c3950ecdee85b34f7501049d5417d34;hp=32b894b4552a582f56666c5aecb11767692fb16e;hpb=bac624360b7b8c029b92989befa0f56e704094cf;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/c-objc-common.c b/gcc/c-objc-common.c index 32b894b4552..4b09c3e40d8 100644 --- a/gcc/c-objc-common.c +++ b/gcc/c-objc-common.c @@ -1,5 +1,5 @@ /* Some code common to C and ObjC front ends. - Copyright (C) 2001, 2002 Free Software Foundation, Inc. + Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. This file is part of GCC. @@ -26,8 +26,8 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #include "rtl.h" #include "insn-config.h" #include "integrate.h" -#include "expr.h" #include "c-tree.h" +#include "c-pretty-print.h" #include "function.h" #include "flags.h" #include "toplev.h" @@ -36,20 +36,14 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #include "varray.h" #include "ggc.h" #include "langhooks.h" +#include "tree-mudflap.h" #include "target.h" -#include "cgraph.h" +#include "c-objc-common.h" -static bool c_tree_printer PARAMS ((output_buffer *, text_info *)); -static tree inline_forbidden_p PARAMS ((tree *, int *, void *)); -static void expand_deferred_fns PARAMS ((void)); -static tree start_cdtor PARAMS ((int)); -static void finish_cdtor PARAMS ((tree)); +static bool c_tree_printer (pretty_printer *, text_info *); -static GTY(()) varray_type deferred_fns; - -int -c_missing_noreturn_ok_p (decl) - tree decl; +bool +c_missing_noreturn_ok_p (tree decl) { /* A missing noreturn is not ok for freestanding implementations and ok for the `main' function in hosted implementations. */ @@ -61,163 +55,50 @@ c_missing_noreturn_ok_p (decl) such functions always being inlined when optimizing. */ int -c_disregard_inline_limits (fn) - tree fn; +c_disregard_inline_limits (tree fn) { if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL) return 1; - return DECL_DECLARED_INLINE_P (fn) && DECL_EXTERNAL (fn); -} - -static tree -inline_forbidden_p (nodep, walk_subtrees, fn) - tree *nodep; - int *walk_subtrees ATTRIBUTE_UNUSED; - void *fn; -{ - tree node = *nodep; - tree t; - - switch (TREE_CODE (node)) - { - case CALL_EXPR: - t = get_callee_fndecl (node); - - if (! t) - break; - - /* We cannot inline functions that call setjmp. */ - if (setjmp_call_p (t)) - return node; - - switch (DECL_FUNCTION_CODE (t)) - { - /* We cannot inline functions that take a variable number of - arguments. */ - case BUILT_IN_VA_START: - case BUILT_IN_STDARG_START: -#if 0 - /* Functions that need information about the address of the - caller can't (shouldn't?) be inlined. */ - case BUILT_IN_RETURN_ADDRESS: -#endif - return node; - - default: - break; - } - - break; - - case DECL_STMT: - /* We cannot inline functions that contain other functions. */ - if (TREE_CODE (TREE_OPERAND (node, 0)) == FUNCTION_DECL - && DECL_INITIAL (TREE_OPERAND (node, 0))) - return node; - break; - - case GOTO_STMT: - case GOTO_EXPR: - t = TREE_OPERAND (node, 0); - - /* We will not inline a function which uses computed goto. The - addresses of its local labels, which may be tucked into - global storage, are of course not constant across - instantiations, which causes unexpected behavior. */ - if (TREE_CODE (t) != LABEL_DECL) - return node; - - /* We cannot inline a nested function that jumps to a nonlocal - label. */ - if (TREE_CODE (t) == LABEL_DECL - && DECL_CONTEXT (t) && DECL_CONTEXT (t) != fn) - return node; - - break; - - case RECORD_TYPE: - case UNION_TYPE: - /* We cannot inline a function of the form - - void F (int i) { struct S { int ar[i]; } s; } - - Attempting to do so produces a catch-22 in tree-inline.c. - If walk_tree examines the TYPE_FIELDS chain of RECORD_TYPE/ - UNION_TYPE nodes, then it goes into infinite recursion on a - structure containing a pointer to its own type. If it doesn't, - then the type node for S doesn't get adjusted properly when - F is inlined, and we abort in find_function_data. */ - for (t = TYPE_FIELDS (node); t; t = TREE_CHAIN (t)) - if (variably_modified_type_p (TREE_TYPE (t))) - return node; - - default: - break; - } - - return NULL_TREE; + return (!flag_really_no_inline && DECL_DECLARED_INLINE_P (fn) + && DECL_EXTERNAL (fn)); } int -c_cannot_inline_tree_fn (fnp) - tree *fnp; +c_cannot_inline_tree_fn (tree *fnp) { tree fn = *fnp; - tree t; + bool do_warning = (warn_inline + && DECL_INLINE (fn) + && DECL_DECLARED_INLINE_P (fn) + && !DECL_IN_SYSTEM_HEADER (fn)); if (flag_really_no_inline && lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL) - return 1; - - /* Don't auto-inline anything that might not be bound within - this unit of translation. */ - if (!DECL_DECLARED_INLINE_P (fn) && !(*targetm.binds_local_p) (fn)) - goto cannot_inline; - - if (! function_attribute_inlinable_p (fn)) - goto cannot_inline; - - /* If a function has pending sizes, we must not defer its - compilation, and we can't inline it as a tree. */ - if (fn == current_function_decl) { - t = get_pending_sizes (); - put_pending_sizes (t); - - if (t) - goto cannot_inline; + if (do_warning) + warning ("%Jfunction %qF can never be inlined because it " + "is suppressed using -fno-inline", fn, fn); + goto cannot_inline; } - if (DECL_CONTEXT (fn)) + /* Don't auto-inline anything that might not be bound within + this unit of translation. */ + if (!DECL_DECLARED_INLINE_P (fn) && !targetm.binds_local_p (fn)) { - /* If a nested function has pending sizes, we may have already - saved them. */ - if (DECL_LANG_SPECIFIC (fn)->pending_sizes) - goto cannot_inline; + if (do_warning) + warning ("%Jfunction %qF can never be inlined because it might not " + "be bound within this unit of translation", fn, fn); + goto cannot_inline; } - else + + if (!function_attribute_inlinable_p (fn)) { - /* We rely on the fact that this function is called upfront, - just before we start expanding a function. If FN is active - (i.e., it's the current_function_decl or a parent thereof), - we have to walk FN's saved tree. Otherwise, we can safely - assume we have done it before and, if we didn't mark it as - uninlinable (in which case we wouldn't have been called), it - is inlinable. Unfortunately, this strategy doesn't work for - nested functions, because they're only expanded as part of - their enclosing functions, so the inlinability test comes in - late. */ - t = current_function_decl; - - while (t && t != fn) - t = DECL_CONTEXT (t); - if (! t) - return 0; + if (do_warning) + warning ("%Jfunction %qF can never be inlined because it uses " + "attributes conflicting with inlining", fn, fn); + goto cannot_inline; } - - if (walk_tree (&DECL_SAVED_TREE (fn), inline_forbidden_p, fn, NULL)) - goto cannot_inline; return 0; @@ -229,8 +110,7 @@ c_cannot_inline_tree_fn (fnp) /* Called from check_global_declarations. */ bool -c_warn_unused_global_decl (decl) - tree decl; +c_warn_unused_global_decl (tree decl) { if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)) return false; @@ -242,7 +122,7 @@ c_warn_unused_global_decl (decl) /* Initialization common to C and Objective-C front ends. */ bool -c_objc_common_init () +c_objc_common_init (void) { static const enum tree_code stmt_codes[] = { c_common_stmt_codes @@ -255,13 +135,10 @@ c_objc_common_init () if (c_common_init () == false) return false; - lang_expand_decl_stmt = c_expand_decl_stmt; - /* These were not defined in the Objective-C front end, but I'm putting them here anyway. The diagnostic format decoder might want an enhanced ObjC implementation. */ diagnostic_format_decoder (global_dc) = &c_tree_printer; - lang_missing_noreturn_ok_p = &c_missing_noreturn_ok_p; /* If still unspecified, make it match -std=c99 (allowing for -pedantic-errors). */ @@ -273,145 +150,14 @@ c_objc_common_init () mesg_implicit_function_declaration = 0; } - VARRAY_TREE_INIT (deferred_fns, 32, "deferred_fns"); - return true; } -/* Register a function tree, so that its optimization and conversion - to RTL is only done at the end of the compilation. */ - -int -defer_fn (fn) - tree fn; -{ - VARRAY_PUSH_TREE (deferred_fns, fn); - - return 1; -} - -/* Expand deferred functions for C and ObjC. */ - -static void -expand_deferred_fns () -{ - unsigned int i; - - for (i = 0; i < VARRAY_ACTIVE_SIZE (deferred_fns); i++) - { - tree decl = VARRAY_TREE (deferred_fns, i); - - if (! TREE_ASM_WRITTEN (decl)) - { - /* For static inline functions, delay the decision whether to - emit them or not until wrapup_global_declarations. */ - if (! TREE_PUBLIC (decl)) - DECL_DEFER_OUTPUT (decl) = 1; - c_expand_deferred_function (decl); - } - } - - deferred_fns = 0; -} - -static tree -start_cdtor (method_type) - int method_type; -{ - tree fnname = get_file_function_name (method_type); - tree void_list_node_1 = build_tree_list (NULL_TREE, void_type_node); - tree body; - - start_function (void_list_node_1, - build_nt (CALL_EXPR, fnname, - tree_cons (NULL_TREE, NULL_TREE, void_list_node_1), - NULL_TREE), - NULL_TREE); - store_parm_decls (); - - current_function_cannot_inline - = "static constructors and destructors cannot be inlined"; - - body = c_begin_compound_stmt (); - - pushlevel (0); - clear_last_expr (); - add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0); - - return body; -} - -static void -finish_cdtor (body) - tree body; -{ - tree scope; - tree block; - - scope = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0); - block = poplevel (0, 0, 0); - SCOPE_STMT_BLOCK (TREE_PURPOSE (scope)) = block; - SCOPE_STMT_BLOCK (TREE_VALUE (scope)) = block; - - RECHAIN_STMTS (body, COMPOUND_BODY (body)); - - finish_function (0, 0); -} - -/* Called at end of parsing, but before end-of-file processing. */ - -void -c_objc_common_finish_file () -{ - if (pch_file) - c_common_write_pch (); - - if (flag_unit_at_a_time) - { - cgraph_finalize_compilation_unit (); - cgraph_optimize (); - } - else - expand_deferred_fns (); - - if (static_ctors) - { - tree body = start_cdtor ('I'); - - for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors)) - c_expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors), - NULL_TREE)); - - finish_cdtor (body); - } - - if (static_dtors) - { - tree body = start_cdtor ('D'); - - for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors)) - c_expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors), - NULL_TREE)); - - finish_cdtor (body); - } - - { - int flags; - FILE *stream = dump_begin (TDI_all, &flags); - - if (stream) - { - dump_node (getdecls (), flags & ~TDF_SLIM, stream); - dump_end (TDI_all, stream); - } - } -} - /* Called during diagnostic message formatting process to print a source-level entity onto BUFFER. The meaning of the format specifiers is as follows: %D: a general decl, + %E: an identifier or expression, %F: a function declaration, %T: a type. @@ -420,28 +166,92 @@ c_objc_common_finish_file () Please notice when called, the `%' part was already skipped by the diagnostic machinery. */ static bool -c_tree_printer (buffer, text) - output_buffer *buffer; - text_info *text; +c_tree_printer (pretty_printer *pp, text_info *text) { tree t = va_arg (*text->args_ptr, tree); + tree name; + const char *n = "({anonymous})"; + c_pretty_printer *cpp = (c_pretty_printer *) pp; + pp->padding = pp_none; switch (*text->format_spec) { case 'D': + if (DECL_DEBUG_EXPR (t) && DECL_DEBUG_EXPR_IS_FROM (t)) + { + t = DECL_DEBUG_EXPR (t); + if (!DECL_P (t)) + { + pp_c_expression (cpp, t); + return true; + } + } + /* FALLTHRU */ + case 'F': + if (DECL_NAME (t)) + n = lang_hooks.decl_printable_name (t, 2); + break; + case 'T': - { - const char *n = DECL_NAME (t) - ? (*lang_hooks.decl_printable_name) (t, 2) - : "({anonymous})"; - output_add_string (buffer, n); - } - return true; + gcc_assert (TYPE_P (t)); + name = TYPE_NAME (t); + + if (name && TREE_CODE (name) == TYPE_DECL) + { + if (DECL_NAME (name)) + pp_string (cpp, lang_hooks.decl_printable_name (name, 2)); + else + pp_type_id (cpp, t); + return true; + } + else + { + pp_type_id (cpp, t); + return true; + } + break; + + case 'E': + if (TREE_CODE (t) == IDENTIFIER_NODE) + n = IDENTIFIER_POINTER (t); + else + { + pp_expression (cpp, t); + return true; + } + break; default: return false; } + + pp_string (cpp, n); + return true; +} + +/* In C and ObjC, all decls have "C" linkage. */ +bool +has_c_linkage (tree decl ATTRIBUTE_UNUSED) +{ + return true; } -#include "gt-c-objc-common.h" +void +c_initialize_diagnostics (diagnostic_context *context) +{ + pretty_printer *base = context->printer; + c_pretty_printer *pp = XNEW (c_pretty_printer); + memcpy (pp_base (pp), base, sizeof (pretty_printer)); + pp_c_pretty_printer_init (pp); + context->printer = (pretty_printer *) pp; + + /* It is safe to free this object because it was previously XNEW()'d. */ + XDELETE (base); +} + +int +c_types_compatible_p (tree x, tree y) +{ + return comptypes (TYPE_MAIN_VARIANT (x), TYPE_MAIN_VARIANT (y)); +}